Q: What is the sum of all factors of the number 42,780 excluding 42,780?

A: 86,244

Why is 86,244 the sum of all factors of 42,780, excluding 42,780?

The factors of the number 42,780 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 31, 46, 60, 62, 69, 92, 93, 115, 124, 138, 155, 186, 230, 276, 310, 345, 372, 460, 465, 620, 690, 713, 930, 1380, 1426, 1860, 2139, 2852, 3565, 4278, 7130, 8556, 10695, 14260, 21390, 42780.

If you add them up, you will get the total of 42,866. Now subtract 42,780 to get 86,244